i have a question just to see if any of you guys have ran into the same problem as me.

i own a TT 225 quattro, it has the GIAC chip running a 18 PSI but recently the trubo has been spiking past 25 PSI, like way past 25. boost gauge only reads till 25 so iam unsure of the exact number. thought i fixed the problem since i thought it was just the wastegate, but then a week ago the same shit happens. then i notice oil all over my diverter valve, inside and outside. clamps and hoses are fine. then last night my fucking nightmare happens, car started to spike way past 25 again let off the gas to control the boost. then car startes sputtering and i pull to the side of the road. got my car towed to my house. drove the car around today and actually drove it to work, drove fine. but there is oil everywhere in my diverter valve, i took it off the car and its everywhere inside and outside. how the fuck does that much oil get in there?